Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI1999A6 BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCRUISE CONTROL SYSTEMSON BOARD DIAGNOSTIC (OBD) - UP TO 2000AUTOMATIC VERTICAL HEADLIGHT AIM CONTROL SYSTEM (>M.Y. 1999), ON BOARD DIAGNOSTIC (OBD)DIAGNOSTIC TROUBLE CODE (DTC) TABLEAUTOMATIC VERTICAL HEADLIGHT AIM CONTROL SYSTEM
1999 Audi A6 Base
Automatic vertical headlight aim control system
1999 Audi A6 BaseSECTION Automatic vertical headlight aim control system
- All possible malfunctions recognized by the automatic vertical headlight aim control system and printed out by the VAG1551 Scan Tool (ST) are listed on the following pages according to the 5-digit DTC.
- The 5-digit DTC numbers are only shown on the printout.
- Before replacing a component suspected of malfunctioning, check all related wiring connections, harness connections and Ground (GND) connections according to the appropriate wiring diagram.
- After completing necessary repairs, connect the VAG1551 scan tool, check DTC memory (scan tool function 02) and, if necessary, erase DTC memory (scan tool function 05).
- DTC memory contains all static and sporadic faults. A malfunction is recognized as static if it exists for at least 2 seconds. If a static malfunction is no longer present after 2 seconds it will be classified as a sporadic malfunction and identified by the letters 7SP" in the lower right of the VAG1551 scan tool display.
- When the ignition is switched on, all malfunctions present are identified as "sporadic" and are only stored as static malfunctions if they are detected in the next check routine.
- A sporadic malfunction will be erased if it no longer exists after 50 driving cycles (ignition on for at least 5 minutes, road speed above 30 km/h or 18 mph).
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.